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After a long wait, Tech|Inferno now has a Marketplace/Classifieds section where all registered (promoted and above) members can participate in selling, trading and seeking out items. This service is free to all members to use as they wish. Currently all ads last for a period of 14 days before they expire for promoted users. Those users belonging to T|I Elite, Contributor, Developer and Moderator have access to 30 day ad periods that are featured
Some easy rules to remember:
Do not post multiple ads of the same product.
Do not advertise here if you are a retailer or business. You must contact Tech|Inferno for advertising space.
Keep ads civil, do not try to lowball members. You may contact them in private via PM if you feel their price is not to your liking. Harassing members will result in an infraction.
It is recommended you have Heatware/eBay feedback to establish trading credibility.
Tech|Inferno assumes no liability for any sales posted in the Classified section. Always use common sense when buying/selling with traders and ask for their heatware/ebay feedback!
Enjoy!

It looks like it would be a power supply issue. 500W is not 500W for 12V in some cases, depending on your PSU. Read your User manual of your PSU how much Ampere yo have on a single 12V-line. Some PSU allocates the second 12V-line for CPU only.
Example:
22A on first 12V-line = 264W for eGPU + Akitio
22A on second 12V-line = 264W for CPU only
Check the specifications of your PSU and eGPU.

first tip: Dual Monitor Tools is not needed for switching between external and internal display. You only need to click on the game symbol or other running application in the task bar and press WIN+Right (MBP: Command+RIGHT) or WIN+Left (MBP: Command + LEFT) till you can see the windowed application, then start Borderless Gaming for full screen. This is working for ALL Windows applications, where sometimes Dual Monitor Tools fails.
second tip: you can use the same procedure on OSX with BetterTouchTool.
third tip: with Headeless Ghost HDMI Display Dummy Adapter you can work with 1920x1020 up to 120Hz. Also HiDPI resolution are available on OSX. You can also add your own resolutions if you like.

Dual Monitor Tools is not needed for switching between external and internal display. You only need to click on the game symbol or other running application in the task bar and press WIN+Right (MBP: Command+RIGHT) or WIN+Left (MBP: Command + LEFT) till you can see the windowed application, then start Borderless Gaming for full screen. This is working for ALL Windows applications, where sometimes Dual Monitor Tools fails.

Yes, it was... Thanks for your advice!
Now all works ok! I'm working on a solution to work with my 980 Ti on Windows and OS X with high refresh rate through HDMI dummy adapter and HiDPI resolution. 980 Ti is not Optimus compatible, so it's working with the dummy adapter only that simulates a second display.

@kmitza which OS X version do you have? I had the same dilemma on El Capitan 10.11.6 (15G1212) with latest security update. Wiped my SSD out and installed 10.11.6 (15G31). After that and with goalque's automate-eGPU-Script with "-a" switch, OS X recognized my GTX 980 Ti correctly.

@honzicek69 I had the same problem to see my eGPU in Device Manager and saw it only on first boot into Windows. After long testing I found a proof method, maybe works for you as well:
Booting into Windows with always working GTX 980 Ti (and maybe other) - automate-eGPU-Script with "-a" switch already installed:
Boot into OS X - TB unplugged
Plug TB in and restart OS X - from now on TB is plugged in
Boot into OSX again and restart OS X
Boot into Windows - Check Device Manager - only 750M will appear
Restart Windows - Check Device Manager - 750M AND 980 Ti are enabled
Sometimes step 5 is not working, so do the steps 1 - 4 and at step 5 shutdown Windows with TB unplugged, then plug in and start your machine into Windows.

About Us

Tech|Inferno was formed in 2011 by a small group of enthusiasts who wanted to create a platform that would empower others to share in their passion of all things related to modern technology. To achieve this vision, Tech|Inferno invites developers, modders, enthusiasts and dreamers to come on board and share their knowledge with its large and ever growing community.